Saw-set.



G. H. DAVENPORT;

SAW SET.

APPLICATION FILED APR. 15, 1912..

COLUMBIA FMNOGRAFH CO. WASHINGTON, D C.

G. H. DAVENPORT.

SAW SET.

APPLICATION FILED APR. 15, 1912.

1,036,195, Patented Aug. 20, 1912.

2 SHEETS-SHEET 2.

avwamtoz Witweooeo Y COLUMBIA PLANadRAPl-l cm, WASHINGTON. D. c.

anvil blocks.

QHARLES HARRIS DAVENPORT, OF ELK PARK, NORTH CAROLINA, ASSIGNOR TO 0. D.HAMRICK AND F. J. KING, BOTH OF ELK PARK, NORTH CAROLINA.

SAW-SET.

Specification of Letters Patent.

Application filed April 15, 1912. Serial No. 690,771.

To all whom it may concern.

Be it known that I, CHARLES HARRIS DAVENPORT, a citizen of the UnitedStates, residing at Elk Park, in the county of Mitchell and State ofNorth Carolina, have invented certain new and useful Improvements inSaw- Sets; and I do declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to improvements in saw sets.

One object of the invention is to provide a saw set having an improvedconstruction and arrangement of setting mechanism whereby two teeth ofthe saw will be simultaneously upset in opposite directions and toexactly the same distance and having means whereby the extent of the setof the teeth may be regulated.

Another object is to provide a saw set having an improved means forclamplng the device in position on the saw and means for changing thegage of the setting mechanism.

A further object is to provide a saw set which will be simple, strong,and durable in construction, eflicient and reliable in operation andwell adapted to the purpose for which it is designed.

WVith these and other objects in view, the invention consists of certainnovel features of construction, and the combination and arrangement ofparts as will be more fully described and claimed. I

In the accompanying drawings; Flgure 1 is a side view of my improvedsaw; Fig. 2 is a top plan view thereof; Fig. 3 is a verticallongitudinal section taken on the line 8-8 of Fig. 2; Fig. 4 is avertical cross section taken on the line 4-4 of Fig. 1; Fig. 5 1s ahorizontal section taken on the line 5-5 of Fig. 1; Fig. 6 is aperspective view of the supporting frame or casing forthe die or Myimproved saw set comprises a central anvil supporting frame or casing 1which is of rectangular form and is closed on its lower side as shown.In the bottom and sides of the frame is a saw receiving slot 2 withwhich the blade of the saw is engaged when the device is placedinposition thereon. on the ends of the frame or casing 1 are formedchannel shaped plunger supporting bars 3 on the ends of which are formedthe lower stationary members 4 of a pair of plunger operating handlesthe upper members 6 of which are pivotally connected at their inner endsto the outer ends of the bars 3 as shown. On the inner ends of thepivoted members 6 of the handles are formed cam projections or offsets 7which are adapted to engage the outer ends of plunger rods as will behereinafter more fully described.

Arranged in the frame 'or casing 1 are die or anvil blocks 8 and 9against which the teeth of the saw are upset. The blocks 8 and 9 havetheir upper ends curved or beveled outwardly on their inner sides toform the inclined surfaces against which the saw teeth are upset, and insaid blocks are formed transverse passages 10 with which are engaged theinner reduced ends of setting plungers 11 which are disposed in thechannel shaped bars 3 of the frame 1 and are slidably engaged withapertures formed in the adjacent ends of the frame and with aperturesformed in guide plates 12 arranged in the bars 3 as shown. The outerends of the plunger rods when thus arranged are in position to beengaged by the cam projections or ofisets 7 on the inner ends of theplunger operating members 5 of the handles as shown. The plungers 11 areretracted after'each operation thereof by the handle members 5 and areheld in their retracted positions by coiled springs 13 arranged on theplungers between the ends of the frame and a stop pin 14 arrangedthrough the plungers as shown.

The anvil block 9 is of substantially the same width as the spacebetween the sides of the frame 1, while the block 8 is of less widththan said space, and'said block 8 is adapted to be adjusted laterally inone direction or the other to bring the passage therein and the end ofthe plunger engaged with said passage nearer to or farther away block 8.The movement of the block 8 is effected by means of adjusting screws 15one of which has a threaded engagement with each side of the frame 1 andhas its inner end engaged with the adjacent side of the block so that byscrewing one of the screws inwardly and the other outwardly the block 8may be shifted in the desired direction to adjust the inner end. of theplunger rod engaged therewith with respect to the inner end of theplunger rod engaged with the opposing block 9.

The block 9 has onits ends pairs of laterally projectingguide pins 16which are slidably engaged with pairs of horizontally disposed slots 17in the opposite sides of the frame 1, and said block 9 is adapted to beshifted in the frame to clamp the saw between the blocks by means ofclamping screws 18 which have a threaded engagement with one end of theframe and have their inner ends engaged with the outer side of the block9 whereby when the screws are turned inwardly, said block will bebrought into engagement with the adjacent side of the saw and the latterthereby clamped against the inner side of the opposing block 8.

In order to gage or adjust the set of the teeth by the inner ends of theplunger rods,

I provide stop screws 19 which have a threaded engagement with the upperends of the sidesof the frame 1 and have their lower ends projectinginto the upper ends of the slot 2 in said sides whereby the distance atwhich the blade of the saw is permitted to enter the slot is regulatedby the engagement of the ends of the screw with the points of the sawteeth. By thus arranging j the screws 19 it will be seen that when thedevice is applied to the saw, the teeth will be permitted to projectmore or less above the lower side of the inner ends of the plungers or,in other words, the teeth will be ex- V posed to a greater or lessextent to the action of the ends of the plungers when forced intoengagement therewith thus causing the plungersto upset the teeth to agreater or less extent according to the position at which said ends ofthe plungers engage the teeth.

In the operation of the device the slot 2 in the frame 1 is engaged withthe saw blade and the frame lowered on the blade until the ends of thescrews 19 come into engagel, the clamping screws'18 are tightened up togrip the saw between the blocks as hereinbefore described. After the sawhas thus been gripped the handle members are grasped and the uppermember forced downwardly toward the lower member thereby causing theoffset or camprojections on i the inner ends of said handles toengagethe outer ends of the plunger rods thereby forcing the plungers inwardlyagainst the pressure of their retracting springs. This operation of theplungers will project the reduced inner ends thereof through thepassages in the blocks 8 and 9 and against'the opposite sides of thetwovadjacent teeth thereby upsetting one of said teeth in one direction.against the beveled surface of one of the anvil blocks and the othertooth in the opposite direction against the beveled surface of theopposing block, thus setting the teeth to the same distance as will bereadily understood. The reduced tooth engaging ends of the plungers arepreferably of triangular shape to correspond with the triangular shapeof the saw teeth and the extremities of said reduced ends are formed onan angle as shown.

From the foregolngdescription taken 1n connection with the accompanyingdraw- 1. In asaw set, a central supportingframe, plunger supporting barsarranged thereon, stationary handles projecting from said bars, plungerprojecting handles pivot-" ally connected to said bars, tooth settingplungers slidably mounted in said bars, and adapted to be projected bysaid pivoted handles, anvil blocks arranged in said frame and havingtheir inner upper surfaces beveled or inclined in opposite directionsand having therein transversely disposed plunger receiving passages,block adjusting screws arranged in one side of said frame and havingtheir innerends engaged with the outer side of one of saidpluuger'blocks whereby the latter is adjusted to clamp a saw bladebet-ween the same and the opposing block.

2. In a saw set, a central supporting frame having therein a verticalsaw receiving slot and having in its sides horizontal guide slots,plunger supporting. bars arranged on the ends of said frame, station aryhandles on the ends of said bars, plunger projecting handles pivotallyconnected to the bars, spring retracted plungers having reduced toothengaging inner ends, anvil blocks arranged in said frame and havingtherein transverse plunger receiving pas sages, guide pins arranged onthe ends of one of said blocks and havingasliding-engagement with'theguide slots in said frame, block adjusting screws having a threaded.

engagement with one end of the frame and having their inner ends engagedwith said block whereby the latter is adjusted to clamp a saw bladebetween the same and the opposing block, and means whereby the 0pposingblock is adjusted to regulate the distance between the inner ends of theplungers engaged with the passages in the blocks to set difierent sizesof saw teeth.

3. In a saw set, a central supporting frame, plunger supporting barsarranged on and projecting from said frame, stationary handles on theends of said bars, plunger operating handles pivotally connected to thelatter, anvil blocks arranged in said frame and having therein plungerreceiving passages, spring retracted plungers slidably mounted in saidbars and having their inner ends engaged with the passages in said anvilblocks, plunger projecting offsets on said plunger operating handles toproject said plungers through said anvil blocks and into engagement withthe teeth of the saw engaged between the blocks, means whereby one ofsaid blocks is adjusted to bring the end of the plunger engagedtherewith nearer to or farther from the end of the plunger engaged withthe opposing block, and means to adjust the other block whereby theblade of the saw is clamped and held in position between said blocks.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

4. In a saw set a central supporting frame having therein a sawreceiving slot, plunger supporting bars arranged on the ends thereof,stationary handles on said bars, plunger projecting handles pivot-allyconnected to the latter, plungers slidably mounted in said bars, anvilblocks arranged in said frame and having therethrough plunger receivingpassages, one of said blocks being of less width than the width of theframe, means whereby said block is adjusted to vary the distance betweenthe plunger receiving passage therein and the plunger receiving passageon the opposing block whereby the ends of the plungers are spaced agreater or less distance apart for setting teeth of different size andgage screws arranged in the upper edges of the sides of said frame andhaving their inner ends projecting into the upper ends of said sawreceiving slot whereby the engagement of the frame with the saw blade isregulated and the set of the saw teeth by the inner ends of the plungersis gaged.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

CHARLES HARRIS DAVENPORT.

Witnesses:

GEO. H. TRIVETT, OSSIE D. HAMRICK.

Washington, D. 0.

